Selenium dioxide converter

Abstract

The utility model relates to the technical field of selenium dioxide smelting equipment, in particular to a selenium dioxide reformer which comprises an oxidizing chamber body, a settling chamber and a buffer mechanism. The input end of the settling chamber is connected with the output end of the oxidation chamber body; the output end of the settling chamber is connected with a tail gas absorption device; a material collecting drawer is detachably arranged at the bottom end of the settling chamber and is used for receiving condensed selenium dioxide; the buffer mechanism is arranged on the settling chamber and is used for buffering selenium steam and prolonging the contact time of selenium and oxygen. Through the arrangement of the oxygen inlet mechanism, the heating time of crude selenium is shortened, the crude selenium is heated more uniformly, and selenium steam can be in full and uniform contact with oxygen conveniently; through the arrangement of the buffer mechanism, the contact time of selenium steam and oxygen is further prolonged, the oxidation effect is improved, and the conversion efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of selenium dioxide smelting equipment, in particular to a selenium dioxide conversion furnace. Background Technique

[0002] The main use of selenium dioxide is in the electrolytic manganese industry, accounting for more than 80% of the total consumption. The domestic methods for producing selenium dioxide basically adopt the oxygen oxidation method, and the equipment used is a selenium oxidation furnace, which is widely used because of its simple structure and stable products.

[0003] Chinese Patent with the authorization announcement number CN216785731U discloses a selenium dioxide production device, including a temperature instrument cabinet and an oxidation chamber. The oxidation chamber includes an upper oxidation chamber and a lower oxidation chamber. An oxygen inlet and a PLC temperature control system A are arranged above the oxidation chamber. A heater A and a heater B are respectively arranged below the upper oxidation chamber and at the bottom of the lower oxidation chamber. Baffles are arranged in both the primary sedimentation chamber and the secondary sedimentation chamber. In the utility model, the feeding port is arranged on the side and is on the same horizontal line as the connecting pipe, which is easy to dredge crystalline selenium dioxide. An expansion joint is arranged on the connecting pipe between the oxidation chamber and the multi-stage sedimentation chamber, which is easy to disassemble and clean the blocked flue. The heater is portable, with a simple structure, low manufacturing cost, convenient maintenance and operation, and high production efficiency.

[0004] However, the above disclosed solution has the following deficiencies: By arranging baffles inside the primary sedimentation chamber and the secondary sedimentation chamber, the residence time of selenium vapor in the sedimentation chamber is limited, and selenium and oxygen cannot fully contact and oxidize, reducing the conversion efficiency of selenium raw materials. Content of the Utility Model

[0005] The purpose of the utility model is to propose a selenium dioxide conversion furnace aiming at the problems existing in the background technique.

[0006] The technical solution of the utility model: A selenium dioxide conversion furnace includes an oxidation chamber body, on which an oxygen inlet pipe is arranged; a sedimentation chamber, whose input end is connected to the output end of the oxidation chamber body, and the output end of the sedimentation chamber is connected with a tail gas absorption device; a detachable aggregate drawer is arranged at the bottom end of the sedimentation chamber for receiving condensed selenium dioxide; and a buffer mechanism is arranged on the sedimentation chamber for buffering selenium vapor and increasing the contact time between selenium and oxygen.

[0007] Preferably, the buffer mechanism includes a lifting component installed on the outer wall of the sedimentation chamber; a top plate installed at the output end of the lifting component, with multiple sets of sliding channels opened at the top of the sedimentation chamber, and a sealing seat is arranged on the sliding channels; a plurality of first buffer plates, which are evenly installed on the top plate and are slidably connected to the corresponding sliding channels and sealing seats; and a second buffer plate, which is arranged between two adjacent first buffer plates, the second buffer plate is connected to the top of the top plate and is slidably connected to the corresponding sliding channels and sealing seats, the bottom end of the second buffer plate abuts against the aggregate drawer, and a circulation port is opened on the second buffer plate.

[0008] Preferably, the buffer mechanism further includes a plurality of scrapers, with two sets of scrapers symmetrically arranged on both sides of the first buffer plate and the second buffer plate, and the scraper abuts against the side wall of the first buffer plate or the second buffer plate; and a plurality of insertion rods, which are installed at the top end inside the sedimentation chamber, and the other end of the insertion rod is connected to the scraper.

[0009] Preferably, the insertion rod is composed of a sleeve, an insertion rod and a buffer spring. The sleeve is obliquely installed at the top end inside the sedimentation chamber, the insertion rod is slidably sleeved inside the sleeve, and the buffer spring is installed inside the sleeve, and the buffer spring connects the sleeve and the insertion rod.

[0010] Preferably, an oxygen inlet mechanism is arranged on the oxidation chamber body. The oxygen inlet mechanism includes an oxygen inlet pipe rotatably connected to the oxidation chamber body, an air inlet valve rotatably connected to the top end of the oxygen inlet pipe, a limiting frame externally connected to the air inlet valve, and the limiting frame is connected to the oxidation chamber body; a driving component arranged at the top end of the oxidation chamber body for driving the oxygen inlet pipe to rotate; and a plurality of shunt pipes, which are evenly distributed on the outer peripheral surface of the oxygen inlet pipe, and a plurality of air outlet holes are opened on the shunt pipes.

[0011] Preferably, the air outlet holes are arranged on the side wall of the shunt pipe, and an interception net is arranged on the air outlet holes.

[0012] Compared with the prior art, the above technical solutions of the present utility model have the following beneficial technical effects: through the setting of the oxygen inlet mechanism, the heating time of the crude selenium is shortened, so that it is heated more evenly, and it is convenient for selenium vapor to fully and evenly contact with oxygen; through the setting of the buffer mechanism, the contact time between selenium vapor and oxygen is further increased, the oxidation effect is improved, and the conversion efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0014] Figure 2 is a schematic diagram of the connection mode of the oxygen inlet mechanism and the oxidation chamber body of the present utility model;

[0015] Figure 3Schematic diagram of the connection mode between the buffer mechanism and the sedimentation chamber of the present utility model;

[0016] Figure 4 Schematic diagram of part A structure of the present utility model.

[0017] Reference numerals: 1, oxidation chamber body; 2, oxygen inlet pipe; 201, drive assembly; 202, intake valve; 203, limit frame; 204, shunt pipe; 205, air outlet hole; 3, sedimentation chamber; 301, sealing seat; 302, aggregate drawer; 4, lifting assembly; 401, top plate; 402, first buffer plate; 403, second buffer plate; 404, circulation port; 5, sleeve; 501, insertion rod; 502, scraper. Specific embodiments

[0018] Embodiment 1

[0019] As Figures 1 to 4 shown, a selenium dioxide conversion furnace proposed by the present utility model includes an oxidation chamber body 1, a sedimentation chamber 3, and a buffer mechanism. An oxygen inlet pipe 2 is provided on the oxidation chamber body 1; the input end of the sedimentation chamber 3 is connected to the output end of the oxidation chamber body 1, and the output end of the sedimentation chamber 3 is connected to a tail gas absorption device for reacting excess selenium dioxide with water to generate selenious acid solution for subsequent recovery treatment. This is the prior art, and the specific structure and principle are detailed in the patent with the authorization announcement number CN216785731U and will not be elaborated here; a detachable aggregate drawer 302 is provided at the bottom of the sedimentation chamber 3 for receiving condensed selenium dioxide; the buffer mechanism is provided on the sedimentation chamber 3 for buffering selenium vapor, increasing the contact time between selenium and oxygen, and ensuring the oxidation effect.

[0020] Furthermore, the buffer mechanism includes a lifting assembly 4, a top plate 401, a first buffer plate 402, and a second buffer plate 403; the lifting assembly 4 is installed on the outer wall of the sedimentation chamber 3, and the lifting assembly 4 is set as an electric telescopic rod; the top plate 401 is installed at the output end of the lifting assembly 4, and a plurality of sliding channels are opened at the top of the sedimentation chamber 3, and a sealing seat 301 is provided on the sliding channels to prevent leakage at the connection; a number of groups of first buffer plates 402 are provided, and a number of groups of first buffer plates 402 are evenly installed on the top plate 401 and are slidably connected to the corresponding sliding channels and sealing seats 301; the second buffer plate 403 is arranged between two adjacent groups of first buffer plates 402, the second buffer plate 403 is connected to the top of the top plate 401, and is slidably connected to the corresponding sliding channels and sealing seats 301, the bottom end of the second buffer plate 403 abuts against the aggregate drawer 302, and a circulation port 404 is opened on the second buffer plate 403. The height of the bottom end of the circulation port 404 relative to the aggregate drawer 302 is higher than the height of the bottom end of the first buffer plate 402 relative to the aggregate drawer 302, so that the selenium vapor presents a continuous S shape when wandering in the sedimentation chamber 3, prolonging the contact time between selenium and oxygen and improving the oxidation effect.

[0021] Furthermore, the buffer mechanism also includes scrapers 502 and insertion rods; there are multiple groups of scrapers 502, and two groups of scrapers 502 are symmetrically arranged on both sides of the first buffer plate 402 and the second buffer plate 403, and the scrapers 502 are abutted against the side walls of the first buffer plate 402 or the second buffer plate 403; there are several groups of insertion rods, which are installed at the top of the sedimentation chamber 3, and the other end of the insertion rod is connected to the scraper 502.

[0022] Furthermore, the plug rod is composed of a sleeve 5, a plug rod 501 and a buffer spring. The sleeve 5 is obliquely installed at the top of the sedimentation chamber 3, the plug rod 501 is slidably sleeved inside the sleeve 5, the buffer spring is installed inside the sleeve 5, and the buffer spring connects the sleeve 5 and the plug rod 501; the setting of the plug rod is convenient for self-adjustment to avoid damage to the first buffer plate 402 or the second buffer plate 403 caused by the scraper 502.

[0023] In this embodiment, crude selenium raw material oil is added to the feed port of the oxidation chamber body 1, and the oxidation chamber body 1 is started to heat the crude selenium. After heating to a certain degree, an appropriate amount of oxygen is input into the oxidation chamber body 1 through the oxygen inlet pipe 2, and the volatilized selenium in the oxidation chamber body 1 is oxidized into gaseous selenium dioxide. The tail gas absorption device at the output end of the oxygen inlet pipe 2 is started, so that the selenium dioxide enters the settling chamber 3 to be condensed into a crystal state, and finally falls into the collection drawer 302 for collection;

[0024] Selenium dioxide vapor enters the sedimentation chamber 3, passes through multiple groups of staggered first buffer plates 402 and second buffer plates 403, so that the selenium dioxide vapor moves in an S shape inside the sedimentation chamber 3, increasing the contact time between selenium and oxygen and improving the oxidation effect. When the conversion is completed, the top plate 401 is driven to rise by the lifting component 4, thereby driving multiple groups of first buffer plates 402 and second buffer plates 403 to move along the height direction of the sedimentation chamber 3. The scraper 502 can scrape off the selenium dioxide crystals attached to the side walls of the first buffer plates 402 and the second buffer plates 403 and drop them into the collection drawer 302 for collection. The arrangement of the plug rod is convenient for self-adjustment to avoid damage to the first buffer plate 402 or the second buffer plate 403 by the scraper 502. When the bottom end of the second buffer plate 403 is away from the collection drawer 302, the collection drawer 302 is pulled out of the sedimentation chamber 3 to collect the selenium dioxide crystals.

[0025] Embodiment 2

[0026] like Figure 1 and Figure 2As shown in the figure, a selenium dioxide conversion furnace proposed by the present utility model, compared with the first embodiment, an oxygen inlet mechanism is provided on the oxidation chamber body 1. The oxygen inlet mechanism includes an oxygen inlet pipe 2, a driving component 201 and a shunt pipe 204; the oxygen inlet pipe 2 is rotatably connected to the oxidation chamber body 1, the top end of the oxygen inlet pipe 2 is rotatably connected to an air inlet valve 202, an outer portion of the air inlet valve 202 is fixedly connected with a limit frame 203, and the limit frame 203 is connected to the oxidation chamber body 1; the driving component 201 is arranged at the top end of the oxidation chamber body 1 and is used for driving the oxygen inlet pipe 2 to rotate. The driving component 201 is composed of a motor-driven gear transmission component, and the gear transmission component connects the oxygen inlet pipe 2 and the output end of the motor; multiple groups of shunt pipes 204 are provided, and the multiple groups of shunt pipes 204 are evenly distributed on the outer peripheral surface of the oxygen inlet pipe 2. Multiple groups of air outlet holes 205 are formed in the shunt pipe 204.

[0027] Further, the air outlet holes 205 are arranged on the side wall of the shunt pipe 204, and an intercepting net is arranged on the air outlet holes 205 to prevent the coarse selenium raw material from blocking the air outlet holes 205 and interfering with the entry of oxygen.

[0028] In this embodiment, by starting the driving component 201 to drive the oxygen inlet pipe 2 to rotate and then drive the multiple groups of shunt pipes 204 to rotate, the coarse selenium raw material inside the oxidation chamber body 1 can be stirred, which is convenient for the oxidation chamber body 1 to heat it fully and evenly, shortens the heating time, improves the conversion efficiency. Oxygen is conveyed from the air inlet valve 202 and the oxygen inlet pipe 2 to the shunt pipe 204, and then the oxygen is discharged from the multiple groups of air outlet holes 205, so that the oxygen can be in full contact with the selenium vapor, further improving the oxidation efficiency.

[0029] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited thereto. Various changes can be made without departing from the gist of the present utility model within the knowledge scope of those skilled in the technical field to which the present utility model pertains.

Claims

1. A selenium dioxide converter, characterized in that: include An oxidation chamber body (1) is provided with an oxygen inlet pipe (2); The settling chamber (3) has an input end connected to the output end of the oxidation chamber body (1), and the output end of the settling chamber (3) is connected to a tail gas absorption device; a collection drawer (302) is detachably provided at the bottom end of the settling chamber (3) for receiving the selenium dioxide after condensation; and a buffer mechanism, which is arranged on the sedimentation chamber (3) and is used to buffer the selenium vapor and increase the contact time between selenium and oxygen. The buffer mechanism includes A lifting assembly (4) mounted on the outer wall of the settling chamber (3); A top plate (401) is installed at the output end of the lifting assembly (4), and a plurality of sliding channels are provided on the top of the settling chamber (3), and a sealing seat (301) is provided on the sliding channels; A first buffer plate (402) is provided in a plurality of groups, wherein the plurality of groups of first buffer plates (402) are evenly mounted on the top plate (401) and are slidably connected to the corresponding sliding channels and the sealing seat (301); A second buffer plate (403) is arranged between two adjacent groups of first buffer plates (402); the second buffer plate (403) is connected to the top of the top plate (401), and is slidably connected to the corresponding sliding channel and the sealing seat (301); the bottom end of the second buffer plate (403) is in contact with the material collection drawer (302); and a flow port (404) is provided on the second buffer plate (403); The scrapers (502) are provided in multiple groups, and two groups of scrapers (502) are symmetrically provided on both sides of the first buffer plate (402) and the second buffer plate (403), and the scrapers (502) are in contact with the side walls of the first buffer plate (402) or the second buffer plate (403); And a plurality of insert rods are provided, the insert rods are installed at the top end inside the sedimentation chamber (3), and the other end of the insert rods is connected to the scraper (502).

2. A selenium dioxide converter according to claim 1, characterized in that: The insertion rod is composed of a sleeve (5), an insertion rod (501) and a buffer spring. The sleeve (5) is obliquely installed at the top end of the sedimentation chamber (3). The insertion rod (501) is slidably sleeved inside the sleeve (5). The buffer spring is installed inside the sleeve (5). The buffer spring connects the sleeve (5) and the insertion rod (501).

3. A selenium dioxide converter according to claim 1, characterized in that: The oxidation chamber body (1) is provided with an oxygen supply mechanism, which includes An oxygen inlet pipe (2) is rotatably connected to the oxidation chamber body (1); the top end of the oxygen inlet pipe (2) is rotatably connected to an air inlet valve (202); the air inlet valve (202) is externally connected to a limiting frame (203); and the limiting frame (203) is connected to the oxidation chamber body (1); A driving assembly (201) is arranged at the top of the oxidation chamber body (1) and is used to drive the oxygen inlet pipe (2) to rotate; And a plurality of diverter pipes (204) are provided, the plurality of diverter pipes (204) are evenly distributed on the outer peripheral surface of the oxygen inlet pipe (2), and the diverter pipes (204) are provided with a plurality of gas outlet holes (205).

4. A selenium dioxide converter according to claim 3, characterized in that: The air outlet (205) is arranged on the side wall of the diversion pipe (204), and an interception net is arranged on the air outlet (205).

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